diff --git a/include/common.h b/include/common.h
index 88322ca..c017d4c 100644
--- a/include/common.h
+++ b/include/common.h
@@ -392,7 +392,7 @@ inline bool str2uint(const char* str, uint64_t* res)
 
 inline bool str2double(const std::string& str, double* res) {return str2double(str.c_str(),res);}
 inline bool str2int(const std::string& str, int64_t* res) {return str2int(str.c_str(),res);}
-inline bool str2uint(const std::string& str, int64_t* res) {return str2uint(str.c_str(),res);}
+inline bool str2uint(const std::string& str, uint64_t* res) {return str2uint(str.c_str(),res);}
 
 inline void tolower(std::string& str) {for(auto& p: str) p=tolower(p);}
 inline void tolower(std::string* str) {for(auto& p:*str) p=tolower(p);}